Block Island weather by month

Check out Block Island weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in Block Island (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
37°F maximum daytime temperature in January in Block Island37
37°F maximum daytime temperature in February in Block Island37
45°F maximum daytime temperature in March in Block Island45
55°F maximum daytime temperature in April in Block Island55
64°F maximum daytime temperature in May in Block Island64
73°F maximum daytime temperature in June in Block Island73
79°F maximum daytime temperature in July in Block Island79
79°F maximum daytime temperature in August in Block Island79
72°F maximum daytime temperature in September in Block Island72
63°F maximum daytime temperature in October in Block Island63
52°F maximum daytime temperature in November in Block Island52
41°F maximum daytime temperature in December in Block Island41
Min temperature (night-time)
21°F minimum night-time temperature in January in Block Island21
23°F minimum night-time temperature in February in Block Island23
30°F minimum night-time temperature in March in Block Island30
39°F minimum night-time temperature in April in Block Island39
48°F minimum night-time temperature in May in Block Island48
57°F minimum night-time temperature in June in Block Island57
64°F minimum night-time temperature in July in Block Island64
63°F minimum night-time temperature in August in Block Island63
55°F minimum night-time temperature in September in Block Island55
46°F minimum night-time temperature in October in Block Island46
37°F minimum night-time temperature in November in Block Island37
27°F minimum night-time temperature in December in Block Island27
Heat & Humidity
No heat & humidity in January in Block Island0
No heat & humidity in February in Block Island0
No heat & humidity in March in Block Island0
No heat & humidity in April in Block Island0
No heat & humidity in May in Block Island0
No heat & humidity in June in Block Island0
Low heat & humidity in July in Block IslandL
Low heat & humidity in August in Block IslandL
No heat & humidity in September in Block Island0
No heat & humidity in October in Block Island0
No heat & humidity in November in Block Island0
No heat & humidity in December in Block Island0
Sea temperature
43°F sea temperature in January in Block Island43
39°F sea temperature in February in Block Island39
39°F sea temperature in March in Block Island39
43°F sea temperature in April in Block Island43
50°F sea temperature in May in Block Island50
59°F sea temperature in June in Block Island59
66°F sea temperature in July in Block Island66
68°F sea temperature in August in Block Island68
66°F sea temperature in September in Block Island66
61°F sea temperature in October in Block Island61
54°F sea temperature in November in Block Island54
48°F sea temperature in December in Block Island48

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & Daylight in Block Island

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
10 hours of daylight per day in January in Block Island10
11 hours of daylight per day in February in Block Island11
12 hours of daylight per day in March in Block Island12
13 hours of daylight per day in April in Block Island13
15 hours of daylight per day in May in Block Island15
15 hours of daylight per day in June in Block Island15
15 hours of daylight per day in July in Block Island15
14 hours of daylight per day in August in Block Island14
12 hours of daylight per day in September in Block Island12
11 hours of daylight per day in October in Block Island11
10 hours of daylight per day in November in Block Island10
9 hours of daylight per day in December in Block Island9
UV Index (Maximum)
UV (maximum) index 2 (Low) in January in Block Island2
UV (maximum) index 2 (Low) in February in Block Island2
UV (maximum) index 4 (Moderate) in March in Block Island4
UV (maximum) index 6 (High) in April in Block Island6
UV (maximum) index 7 (High) in May in Block Island7
UV (maximum) index 8 (Very High) in June in Block Island8
UV (maximum) index 8 (Very High) in July in Block Island8
UV (maximum) index 8 (Very High) in August in Block Island8
UV (maximum) index 6 (High) in September in Block Island6
UV (maximum) index 4 (Moderate) in October in Block Island4
UV (maximum) index 2 (Low) in November in Block Island2
UV (maximum) index 1 (Low) in December in Block Island1

Rainfall in Block Island

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
11 days with some rainfall in January in Block Island11
9 days with some rainfall in February in Block Island9
11 days with some rainfall in March in Block Island11
10 days with some rainfall in April in Block Island10
11 days with some rainfall in May in Block Island11
10 days with some rainfall in June in Block Island10
9 days with some rainfall in July in Block Island9
9 days with some rainfall in August in Block Island9
9 days with some rainfall in September in Block Island9
8 days with some rainfall in October in Block Island8
10 days with some rainfall in November in Block Island10
11 days with some rainfall in December in Block Island11
Average monthly rainfall (inches)
4.0 inches monthly rainfall in January in Block Island4.0
3.7 inches monthly rainfall in February in Block Island3.7
4.4 inches monthly rainfall in March in Block Island4.4
4.2 inches monthly rainfall in April in Block Island4.2
3.9 inches monthly rainfall in May in Block Island3.9
3.1 inches monthly rainfall in June in Block Island3.1
3.2 inches monthly rainfall in July in Block Island3.2
4.1 inches monthly rainfall in August in Block Island4.1
3.8 inches monthly rainfall in September in Block Island3.8
3.6 inches monthly rainfall in October in Block Island3.6
4.9 inches monthly rainfall in November in Block Island4.9
4.6 inches monthly rainfall in December in Block Island4.6

More about Block Island

Block Island by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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The climate guide for Rhode Island (Block Island) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in Block Island?

Block Island has a cold climate with warm summers and some rainfall in all months.

Metric (°C)  |  Imperial (°F)

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Tropical storm risk: Block Island, Rhode Island hurricane season

% of month affected by tropical storms
0
0
0
0
0
<1%
<1%
1.5%
2%
0
0
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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More about the USA

Compare Block Island with the USA

Below the Block Island chart shows average maximum daytime temperature for Block Island, Rhode Island, USA and the USA (Washington).

Maximum daytime temperature (°F)

Block Island, Rhode Island, USA
USA (Washington)
37
41
37
45
45
55
55
66
64
75
73
84
79
88
79
86
72
79
63
68
52
57
41
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C)  |  Imperial (°F)

Compare more Block Island weather >>

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